Yoon Seungho is a well-known Assassin in the country. Seungho is a former young master and a lord, but he ran away because of his father's wrath. He became an assassin in hopes to kill his father. Even if Seungho is no longer a higher up, he still had his confidence. He states himself that he is not a patient man. His coercive means include threats to drown others in a well or leave them as food for the tigers where no one would dare suspect him.